Homework Help: calculus

Posted by Yu on Tuesday, November 9, 2010 at 6:17pm.

Tower 1 is 90 ft high and tower 2 is 40 ft high. The towers are 200 ft apart. A guy wire is to run from point A to the top of each tower. [See a picture of this situation on page 274 of the textbook.]
How many feet from tower 1 should point A be so that the total length of guy wire is minimal?

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